Method for manufacturing magnetic recording medium
US7247343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2004 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Aug 25, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/855
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for manufacturing a magnetic recording medium for efficiently and certainly manufacturing a magnetic recording medium. The magnetic recording medium has a recording layer formed to have predetermined concavo-convex pattern and an adequately flat surface. According to this method, a non-magnetic material is deposited on and filled into a member to be processed 10 by adjusting sputtering conditions in such a manner as to satisfy the following Eq I:0.1≦V/V0−0.003×(L·d/t)+1.2 Eq Iwhere V represents a deposition rate which is the film thickness per unit of time, V0 represent a deposition rate in a case that the bias power is zero, t represents the film thickness of the deposited non-magnetic material, L represents the width of a recording element, and d represents the depth of a recessed portion between the recording elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.